Elastic-fluid turbine



Nov. 8, 1927. 1,648,681

R. F. HALLIWELL ELASTIC FLUID TURBINE FiledADec. s, 1925 2 sheets-Shout 1 5 'IIIIIIIIIIIIIIII A com-Quad bg governing means In o ;v

Reginald F. H 6| I we! DECEASED 5igne Emilia HaHIW||,Ex|-:cu'rrux Hen Attorney.-

Patented Nov. 8, 1927.

UNITED STATES REGINALD F. HALLIWELL, DECEASED, LATE F LEAMING'J'JON SPA, ENGLAND, BY

PATENT SIG-NE EMILIA HALLIWELL, EXECUTBIX, OF LEAMING'ION SPA, ENGLAND, AS- SIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW'YORK.

ELASTIGFLUID TURBINE.

application filed December 3, 1925, Serial No. 73,036, and in. Great BritainlDeceni'her11, 1324.

This invention relates to elastic fluid turbines of the type having both high and low pressure stages and has for its object to provide improved means for controlling the admission of elastic fluid to the low pressure stages.

According to the present invention, the supply of fluid to the low pressure stages is regulated by means of a sliding ring valve which is movable in an axial direction relative to its seating under the control of suitable governing means. The governing means may be arranged to move the ring in a circular direction in response to a change in the 15 operating conditions of the turbine, in which case the ring is so mounted that such circular movement effects a corresponding axial displacement of the ring, as, for example, by arranging diagonally disposed keys on the ring support to engage in corresponding grooves in the internal face of the ring. The

a circular movement of the ring may be effected by a rack, or other suitable gear, op-

erated by a servo-motor, the fluid supply to the cylinder of which is controlled by suit able governing means such as a speed governor, a pressure responsive device, or a combination of the two.

*or a consideration of what is believed to be novel and the invention, attention is directed to the accompanying description and the claims appended thereto.

Referring to the drawing, Figs. 1, 2 and 3 are respectively a part sectional elevation, 21 section on line AA of Fig. 1, and a section on line BB of Fig. 2 of a mixed pressure turbine, and Fig. 4 is a part sectional elevation of an extraction turbine.

Referring first to Figs. 1, 2 and 3, 1 represents the turbine shaft on which are mounted a wheel 2 carrying rotor blades 3 at its periphery and forming a high pressure stage, and a wheel 4 carrying rotor blades 5 at its perpihery and forming a low pressure stage. The high pressure steam enters at 6 and passes through high pressure nozzles 7 and the blading 3, being discharged through a ring of nozzles 8 and the blading 5 of the low pressure stage. Low pressure steam enters at the opening 9 and is arranged to pass by way of ports 10 to a ring of nozzles 11 and the bla'ding 5.

The admission of low pressure steam to the ports 10 is controlled by means of a sliding ring valve 12, which is arranged to be partially rotated through a rack 13, or other. suitable gearing, by means of a servo-motor 14, the fluid supply to the cylinder of which is controlled by a speed governor, a pressure responsive device, or a combination of the two. The arrangement of-the governing means in connection with the servo-motor is not illustrated, as such arrangements are well known. Any suitable means may be utilized. The ring valve 12 is provided with diagonal grooves 15 on its internal face, as shown in Fig. 3. These grooves engage with keys 16 fixed on a diaphragm 17'011 whichthe valve rotates. lVith this arrangement, when the valve 12 is moved in a circular direction by the governing means, it is caused to move axially, thus approaching or receding from a seating 18.

In the extraction turbine shown in Fig. .4,

in which the various parts have been numbered to correspond to-those in-Figs. 1, 2 and 3, but with the exponent a added, part of the steam leaving the high pressure stages is led through the opening 9 for heating or other industrial'purposes. The steam which is required to pass through the low pressure stages to develop the necessary power is admitted through the 'ports 10 to a .ringof nozzles 11 and then through the low pressure stages. The admission of steam to the ports 10 is regulated by the valve 12 in a similar manner to that described with reference to Figs. 1, 2 and 3.

A ring valve structure embodying the invention has the advantage that it provides patent statutes, the principle of operation of the invention has been described, together with the apparatus which is now considered to represent the best embodiment thereof, but it should be understood that the apparatus shown is only illustrative and that theinvention may be carried out by other means.

What is claimed as new and desired to be secured by Letters Patent of the United States is 1. The combination with a turbine having high and low pressure stages and a rotor, of an annular valve meanscontrolling the flow of elastic fluid to the low pressure stages and surrounding the rotor, said valve means comprising an axially-extending annular wall past which the elastic fluid flows, an annular ring valve slidably mounted on said wall, diagonally disposed keys ring and wall, and means for moving said ringcircumferentially to effect axial movement of the ring.

2. In an axial having a rotor, valve means controlling the flow of elastic fluid conlprising a radiallyextending annular *all forming a valve seat, an axially-extending annular wall adjacent thereto, said alls surrounding the rotor, a ring valve seated on said axially-extending wall, and means for moving it axially thereon into and out of engagement with the radially extending wall.

means 1n sald diaphragm controlled by said ring valve.

between the a flow elastic fluid turbine- 4. The combination with an'axial flow elastic fluid turbine havinga rotor, of an annular valve means for fcontrolhng the flow 'oi elastic fluid therein, said means compris mg an annular ring surrounding the rotor and forming a movable valve, an interstage diaphra gm having an. annular axially e Xtending wall on which the ring is slidably and rotatably mounted, means providing an an nular radial. seat for one end of the ring, a plurality of ports in saidwall covered by said ring, means for moving said ring to uncover Paid ports, and means connecting said ring and wall for carrying the T1115, axially when the rnng is rotated.

a 5. In an axial fiowelastic fluid turbine, an

annular interstage diaphragm having an axially extending annular wall and an adjoining radial wall providing a "valve. Seat,

an annular ring valve having diagonally extendinggrooves on 1t-s inner face slidably mounted on said aXiallyeX-tending wallto' move into and out of engagement with said. valve seat, diagonally disposed keys carried by the annular wall with which keys the diagonally extending grooves in the valve ring engage to guide the valve in its movement, means connected With the valve to 11love it on said keys into andout ofengagement with the valve seat, a ringot nozzles carried by the diaphragm, and a plurality of ports in said di aphragni which cOmmunicatewith the nozzles, saidports havingjinlet ends in said annular wall adjacent; the valve seat whereby they are uncovered as the valve moves in a direction away from the seat In witness whereof I have "hereunto set my hand this 11th day or N0vember,1925, SIGNE EldILlA HALLDVELL,

Emecu-tm'm of the last will anal te-Stamwt of Reginald F. Ha-Zliwell, deceased 

